angular2+ xlsx export

excel.service.ts

import { Injectable } from '@angular/core';

import * as XLSX from 'xlsx';

const EXCEL_EXTENSION = '.xlsx';

@Injectable()
export class ExcelService {

  constructor() { }

  public exportAsExcelFile(json: any[], excelFileName: string): void {

    const worksheet: XLSX.WorkSheet = XLSX.utils.json_to_sheet(json);

    const workbook: XLSX.WorkBook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(workbook, worksheet, 'Student');

    XLSX.writeFile(workbook, excelFileName + '_export_' + new Date().getTime() + EXCEL_EXTENSION);

  }

}